<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			.mm{
				width: 100px;
				height: 100px;
				background-color: #FF0000;
				animation: run 2s linear infinite;
				position: relative;
			}
			@keyframes run{
				from{ left: 0px; top: 0px;}
				to{left: 300px; top: 300px;}
			}
		</style>
	</head>
	<body>
		<div class="mm"></div>
	</body>
</html>
